标  题: How subclass the listbox portion of a combobox?  
发信人: Pacific (无情~~~Nolove), 信区: VisualC
发信站: BBS 水木清华站 (Fri Oct 16 17:46:43 1998)


  The listbox portion of a combobox is of type COMBOLBOX  ( notice the           
'L').                                                                            
Because the ComboLBox window is not a child of the ComboBox window, it is        
not obvious how to subclass the COMBOLBOX control.  Luckily, under the           
Win32                                                                            
API, Windows sends a message to the COMBOBOX ( notice no 'L') called             
WM_CTLCOLORLISTBOX before the listbox is drawn. The lParam passed with this      
message contains the handle of the listbox. For example:                         
                                                                                 
LRESULT CFileUpdateCombo::OnCtlColorListBox(WPARAM wParam,                       
                                                                                 
LPARAM lParam)                                                                   
                                                                                 
{                                                                                
                                                                                 
        if ( ! m_bSubclassedListBox )                                            

        (原文此处缺代码）

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☆ 来源:．哈工大紫丁香 bbs.hit.edu.cn．[FROM: yazhou.bbs@bbs.net.t]
※ 修改:．fzx 于 Aug  9 16:44:14 修改本文．[FROM: heart.hit.edu.cn]